Separate Docusaurus Build & Deploy Workflow Steps (#6496)

.github/workflows/docusaurus-site.yml

@@ -1,4 +1,5 @@
-# This workflow builds and publishes the Docusaurus site to:
+# This workflow builds the Docusaurus site on pull_request.
+# It also publishes the site on push to master to:
 # https://plutus.cardano.intersectmbo.org/docs
 
 name: "🦕 Docusaurus Site" 
@@ -8,10 +9,11 @@ on:
     branches: 
       - master 
   workflow_dispatch:
+  pull_request:
 
 jobs:
-  deploy:
-    name: Deploy 
+  run:
+    name: Run 
     runs-on: [self-hosted, plutus-shared]
     permissions:
       contents: write
@@ -26,8 +28,9 @@ jobs:
         run: nix develop --no-warn-dirty --accept-flake-config --command bash -c 'yarn && yarn build'
 
       - name: Deploy Site 
+        if: github.event_name == 'push'
         uses: JamesIves/github-pages-deploy-action@v4.6.4
         with:
           folder: doc/docusaurus/build
           target-folder: docs
-          single-commit: true
+          single-commit: true